fakevimplugin.cpp 38.4 KB
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/**************************************************************************
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**
** This file is part of Qt Creator
**
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** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** Commercial Usage
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**
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** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** If you are unsure which license is appropriate for your use, please
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** contact the sales department at http://qt.nokia.com/contact.
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**
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**************************************************************************/
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#include "fakevimplugin.h"

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#include "fakevimhandler.h"
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#include "ui_fakevimoptions.h"

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#include <coreplugin/actionmanager/actionmanager.h>
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#include <coreplugin/actionmanager/actioncontainer.h>
#include <coreplugin/actionmanager/command.h>
#include <coreplugin/actionmanager/command.h>
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#include <coreplugin/coreconstants.h>
#include <coreplugin/editormanager/editormanager.h>
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#include <coreplugin/editormanager/openeditorsmodel.h>
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#include <coreplugin/filemanager.h>
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#include <coreplugin/icore.h>
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#include <coreplugin/ifile.h>
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#include <coreplugin/dialogs/ioptionspage.h>
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#include <coreplugin/actionmanager/commandmappings.h>
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#include <coreplugin/messagemanager.h>
#include <coreplugin/uniqueidmanager.h>

#include <projectexplorer/projectexplorerconstants.h>
#include <projectexplorer/session.h>

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#include <texteditor/basetextdocumentlayout.h>
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#include <texteditor/basetexteditor.h>
#include <texteditor/basetextmark.h>
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#include <texteditor/completionsupport.h>
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#include <texteditor/texteditorconstants.h>
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#include <texteditor/tabsettings.h>
#include <texteditor/texteditorsettings.h>
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#include <texteditor/textblockiterator.h>
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#include <find/findplugin.h>
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#include <find/textfindconstants.h>

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#include <utils/qtcassert.h>
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#include <utils/savedaction.h>
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#include <utils/treewidgetcolumnstretcher.h>
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#include <cppeditor/cppeditorconstants.h>

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#include <cpptools/cpptoolsconstants.h>

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#include <indenter.h>

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#include <QtCore/QDebug>
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#include <QtCore/QtPlugin>
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#include <QtCore/QObject>
#include <QtCore/QPoint>
#include <QtCore/QSettings>
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#include <QtCore/QTextStream>
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#include <QtGui/QDesktopServices>
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#include <QtGui/QMessageBox>
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#include <QtGui/QPlainTextEdit>
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#include <QtGui/QShortcut>
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#include <QtGui/QTextBlock>
#include <QtGui/QTextCursor>
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#include <QtGui/QTextEdit>
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#include <QtGui/QTreeWidgetItem>
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using namespace FakeVim::Internal;
using namespace TextEditor;
using namespace Core;
using namespace ProjectExplorer;


namespace FakeVim {
namespace Constants {

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const char * const INSTALL_HANDLER        = "TextEditor.FakeVimHandler";
const char * const MINI_BUFFER            = "TextEditor.FakeVimMiniBuffer";
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const char * const INSTALL_KEY            = "Alt+V,Alt+V";
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const char * const SETTINGS_CATEGORY      = "D.FakeVim";
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const char * const SETTINGS_ID            = "A.General";
const char * const SETTINGS_EX_CMDS_ID    = "B.ExCommands";
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const char * const CMD_FILE_NEXT          = "FakeVim.SwitchFileNext";
const char * const CMD_FILE_PREV          = "FakeVim.SwitchFilePrev";
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} // namespace Constants
} // namespace FakeVim


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///////////////////////////////////////////////////////////////////////
//
// FakeVimOptionPage
//
///////////////////////////////////////////////////////////////////////

namespace FakeVim {
namespace Internal {

class FakeVimOptionPage : public Core::IOptionsPage
{
    Q_OBJECT

public:
    FakeVimOptionPage() {}

    // IOptionsPage
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    QString id() const { return QLatin1String(Constants::SETTINGS_ID); }
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    QString displayName() const { return tr("General"); }
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    QString category() const { return QLatin1String(Constants::SETTINGS_CATEGORY); }
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    QString displayCategory() const { return tr("FakeVim"); }
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    QIcon categoryIcon() const { return QIcon(); } // TODO: Add an icon or move into another category
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    QWidget *createPage(QWidget *parent);
    void apply() { m_group.apply(ICore::instance()->settings()); }
    void finish() { m_group.finish(); }
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    virtual bool matches(const QString &) const;
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private slots:
    void copyTextEditorSettings();
    void setQtStyle();
    void setPlainStyle();

private:
    friend class DebuggerPlugin;
    Ui::FakeVimOptionPage m_ui;
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    QString m_searchKeywords;
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    Utils::SavedActionSet m_group;
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};

QWidget *FakeVimOptionPage::createPage(QWidget *parent)
{
    QWidget *w = new QWidget(parent);
    m_ui.setupUi(w);

    m_group.clear();
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    m_group.insert(theFakeVimSetting(ConfigUseFakeVim),
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        m_ui.checkBoxUseFakeVim);
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    m_group.insert(theFakeVimSetting(ConfigReadVimRc),
        m_ui.checkBoxReadVimRc);
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    m_group.insert(theFakeVimSetting(ConfigExpandTab),
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        m_ui.checkBoxExpandTab);
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    m_group.insert(theFakeVimSetting(ConfigHlSearch),
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        m_ui.checkBoxHlSearch);
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    m_group.insert(theFakeVimSetting(ConfigShiftWidth),
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        m_ui.spinBoxShiftWidth);
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    m_group.insert(theFakeVimSetting(ConfigSmartTab),
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        m_ui.checkBoxSmartTab);
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    m_group.insert(theFakeVimSetting(ConfigStartOfLine),
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        m_ui.checkBoxStartOfLine);
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    m_group.insert(theFakeVimSetting(ConfigTabStop),
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        m_ui.spinBoxTabStop);
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    m_group.insert(theFakeVimSetting(ConfigBackspace),
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        m_ui.lineEditBackspace);
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    m_group.insert(theFakeVimSetting(ConfigIsKeyword),
        m_ui.lineEditIsKeyword);
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    m_group.insert(theFakeVimSetting(ConfigAutoIndent),
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        m_ui.checkBoxAutoIndent);
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    m_group.insert(theFakeVimSetting(ConfigSmartIndent),
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        m_ui.checkBoxSmartIndent);
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    m_group.insert(theFakeVimSetting(ConfigIncSearch),
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        m_ui.checkBoxIncSearch);
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    m_group.insert(theFakeVimSetting(ConfigUseCoreSearch),
        m_ui.checkBoxUseCoreSearch);
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    connect(m_ui.pushButtonCopyTextEditorSettings, SIGNAL(clicked()),
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        this, SLOT(copyTextEditorSettings()));
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    connect(m_ui.pushButtonSetQtStyle, SIGNAL(clicked()),
        this, SLOT(setQtStyle()));
    connect(m_ui.pushButtonSetPlainStyle, SIGNAL(clicked()),
        this, SLOT(setPlainStyle()));
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    if (m_searchKeywords.isEmpty()) {
        QTextStream(&m_searchKeywords)
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            << ' ' << m_ui.checkBoxAutoIndent->text()
            << ' ' << m_ui.checkBoxExpandTab->text()
            << ' ' << m_ui.checkBoxSmartIndent->text()
            << ' ' << m_ui.checkBoxExpandTab->text()
            << ' ' << m_ui.checkBoxHlSearch->text()
            << ' ' << m_ui.checkBoxIncSearch->text()
            << ' ' << m_ui.checkBoxSmartTab->text()
            << ' ' << m_ui.checkBoxStartOfLine->text()
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            << ' ' << m_ui.labelShiftWidth->text()
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            << ' ' << m_ui.labelTabulator->text()
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            << ' ' << m_ui.labelBackspace->text();
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        m_searchKeywords.remove(QLatin1Char('&'));
    }
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    return w;
}

void FakeVimOptionPage::copyTextEditorSettings()
{
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    TextEditor::TabSettings ts =
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        TextEditor::TextEditorSettings::instance()->tabSettings();
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    m_ui.checkBoxExpandTab->setChecked(ts.m_spacesForTabs);
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    m_ui.spinBoxTabStop->setValue(ts.m_tabSize);
    m_ui.spinBoxShiftWidth->setValue(ts.m_indentSize);
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    m_ui.checkBoxSmartTab->setChecked(ts.m_smartBackspace);
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    m_ui.checkBoxAutoIndent->setChecked(true);
    m_ui.checkBoxSmartIndent->setChecked(ts.m_autoIndent);
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    m_ui.checkBoxIncSearch->setChecked(true);
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}

void FakeVimOptionPage::setQtStyle()
{
    m_ui.checkBoxExpandTab->setChecked(true);
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    m_ui.spinBoxTabStop->setValue(4);
    m_ui.spinBoxShiftWidth->setValue(4);
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    m_ui.checkBoxSmartTab->setChecked(true);
    m_ui.checkBoxAutoIndent->setChecked(true);
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    m_ui.checkBoxSmartIndent->setChecked(true);
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    m_ui.checkBoxIncSearch->setChecked(true);
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    m_ui.lineEditBackspace->setText(QLatin1String("indent,eol,start"));
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}

void FakeVimOptionPage::setPlainStyle()
{
    m_ui.checkBoxExpandTab->setChecked(false);
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    m_ui.spinBoxTabStop->setValue(8);
    m_ui.spinBoxShiftWidth->setValue(8);
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    m_ui.checkBoxSmartTab->setChecked(false);
    m_ui.checkBoxAutoIndent->setChecked(false);
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    m_ui.checkBoxSmartIndent->setChecked(false);
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    m_ui.checkBoxIncSearch->setChecked(false);
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    m_ui.lineEditBackspace->setText(QString());
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}

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bool FakeVimOptionPage::matches(const QString &s) const
{
    return m_searchKeywords.contains(s, Qt::CaseInsensitive);
}

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} // namespace Internal
} // namespace FakeVim


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///////////////////////////////////////////////////////////////////////
//
// FakeVimExCommandsPage
//
///////////////////////////////////////////////////////////////////////

struct CommandItem
{
    Command *m_cmd;
    QString m_regex;
    QTreeWidgetItem *m_item;
};

Q_DECLARE_METATYPE(CommandItem*);

namespace FakeVim {
namespace Internal {

static QMap<QString, QRegExp> s_exCommandMap;
static QMap<QString, QRegExp> s_defaultExCommandMap;


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class FakeVimExCommandsPage : public Core::CommandMappings
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{
    Q_OBJECT

public:
    FakeVimExCommandsPage() {}

    // IOptionsPage
    QString id() const { return QLatin1String(Constants::SETTINGS_EX_CMDS_ID); }
    QString displayName() const { return tr("Ex Command Mapping"); }
    QString category() const { return QLatin1String(Constants::SETTINGS_CATEGORY); }
    QString displayCategory() const { return tr("FakeVim"); }
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    QIcon categoryIcon() const { return QIcon(); } // TODO: Icon for FakeVim
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    QWidget *createPage(QWidget *parent);
    void initialize();

public slots:
    void commandChanged(QTreeWidgetItem *current);
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    void targetIdentifierChanged();
    void resetTargetIdentifier();
    void removeTargetIdentifier();
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    void defaultAction();

private:
    void setRegex(const QString &regex);
    QList<CommandItem *> m_citems;
};

QWidget *FakeVimExCommandsPage::createPage(QWidget *parent)
{
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    QWidget *w = CommandMappings::createPage(parent);
    setPageTitle(tr("Ex Command Mapping"));
    setTargetHeader(tr("Ex Trigger Expression"));
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    setTargetLabelText(tr("Regular expression:"));
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    setTargetEditTitle(tr("Ex Command"));
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    setImportExportEnabled(false);
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    return w;
}

void FakeVimExCommandsPage::initialize()
{
    Core::ActionManager *am = Core::ICore::instance()->actionManager();
    QTC_ASSERT(am, return);
    UniqueIDManager *uidm = UniqueIDManager::instance();
    QTC_ASSERT(uidm, return);

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    QMap<QString, QTreeWidgetItem *> sections;

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    foreach (Command *c, am->commands()) {
        if (c->action() && c->action()->isSeparator())
            continue;

        CommandItem *ci = new CommandItem;
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        QTreeWidgetItem *item = new QTreeWidgetItem;
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        ci->m_cmd = c;
        ci->m_item = item;
        m_citems << ci;

        const QString name = uidm->stringForUniqueIdentifier(c->id());
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        const int pos = name.indexOf(QLatin1Char('.'));
        const QString section = name.left(pos);
        const QString subId = name.mid(pos+1);

        if (!sections.contains(section)) {
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            QTreeWidgetItem *categoryItem = new QTreeWidgetItem(commandList(), QStringList() << section);
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            QFont f = categoryItem->font(0);
            f.setBold(true);
            categoryItem->setFont(0, f);
            sections.insert(section, categoryItem);
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            commandList()->expandItem(categoryItem);
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        }
        sections[section]->addChild(item);

        item->setText(0, subId);
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        if (c->action()) {
            QString text = c->hasAttribute(Command::CA_UpdateText) && !c->defaultText().isNull() ? c->defaultText() : c->action()->text();
            text.remove(QRegExp("&(?!&)"));
            item->setText(1, text);
        } else {
            item->setText(1, c->shortcut()->whatsThis());
        }
        if (s_exCommandMap.contains(name)) {
            ci->m_regex = s_exCommandMap[name].pattern();
        } else {
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            ci->m_regex.clear();
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        }

        item->setText(2, ci->m_regex);
        item->setData(0, Qt::UserRole, qVariantFromValue(ci));
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        if (ci->m_regex != s_defaultExCommandMap[name].pattern())
            setModified(item, true);
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    }

    commandChanged(0);
}

void FakeVimExCommandsPage::commandChanged(QTreeWidgetItem *current)
{
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    CommandMappings::commandChanged(current);

    if (!current || !current->data(0, Qt::UserRole).isValid())
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        return;
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    CommandItem *citem = qVariantValue<CommandItem *>(current->data(0, Qt::UserRole));
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    targetEdit()->setText(citem->m_regex);
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}

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void FakeVimExCommandsPage::targetIdentifierChanged()
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{
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    QTreeWidgetItem *current = commandList()->currentItem();
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    if (!current)
        return;

    UniqueIDManager *uidm = UniqueIDManager::instance();
    CommandItem *citem = qVariantValue<CommandItem *>(current->data(0, Qt::UserRole));
    const QString name = uidm->stringForUniqueIdentifier(citem->m_cmd->id());

    if (current->data(0, Qt::UserRole).isValid()) {
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        citem->m_regex = targetEdit()->text();
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        current->setText(2, citem->m_regex);
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        s_exCommandMap[name] = QRegExp(citem->m_regex);
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    }
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    if (citem->m_regex != s_defaultExCommandMap[name].pattern())
        setModified(current, true);
    else
        setModified(current, false);
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}

void FakeVimExCommandsPage::setRegex(const QString &regex)
{
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    targetEdit()->setText(regex);
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}

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void FakeVimExCommandsPage::resetTargetIdentifier()
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{
    UniqueIDManager *uidm = UniqueIDManager::instance();
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    QTreeWidgetItem *current = commandList()->currentItem();
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    if (current && current->data(0, Qt::UserRole).isValid()) {
        CommandItem *citem = qVariantValue<CommandItem *>(current->data(0, Qt::UserRole));
        const QString &name = uidm->stringForUniqueIdentifier(citem->m_cmd->id());
        if (s_defaultExCommandMap.contains(name))
            setRegex(s_defaultExCommandMap[name].pattern());
        else
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            setRegex(QString());
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    }
}

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void FakeVimExCommandsPage::removeTargetIdentifier()
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{
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    targetEdit()->clear();
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}

void FakeVimExCommandsPage::defaultAction()
{
    UniqueIDManager *uidm = UniqueIDManager::instance();
    foreach (CommandItem *item, m_citems) {
        const QString &name = uidm->stringForUniqueIdentifier(item->m_cmd->id());
        if (s_defaultExCommandMap.contains(name)) {
            item->m_regex = s_defaultExCommandMap[name].pattern();
        } else {
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            item->m_regex.clear();
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        }
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        setModified(item->m_item, false);
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        item->m_item->setText(2, item->m_regex);
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        if (item->m_item == commandList()->currentItem())
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            commandChanged(item->m_item);
    }
}

} // namespace Internal
} // namespace FakeVim


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///////////////////////////////////////////////////////////////////////
//
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// FakeVimPluginPrivate
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//
///////////////////////////////////////////////////////////////////////

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namespace FakeVim {
namespace Internal {

class FakeVimPluginPrivate : public QObject
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{
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    Q_OBJECT

public:
    FakeVimPluginPrivate(FakeVimPlugin *);
    ~FakeVimPluginPrivate();
    friend class FakeVimPlugin;

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    bool initialize();
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    void aboutToShutdown();
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private slots:
    void editorOpened(Core::IEditor *);
    void editorAboutToClose(Core::IEditor *);
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    void setUseFakeVim(const QVariant &value);
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    void quitFakeVim();
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    void triggerCompletions();
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    void windowCommand(int key);
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    void find(bool reverse);
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    void findNext(bool reverse);
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    void showSettingsDialog();
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    void maybeReadVimRc();
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    void showCommandBuffer(const QString &contents);
    void showExtraInformation(const QString &msg);
    void changeSelection(const QList<QTextEdit::ExtraSelection> &selections);
    void writeFile(bool *handled, const QString &fileName, const QString &contents);
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    void moveToMatchingParenthesis(bool *moved, bool *forward, QTextCursor *cursor);
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    void checkForElectricCharacter(bool *result, QChar c);
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    void indentRegion(int *amount, int beginLine, int endLine,  QChar typedChar);
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    void handleExCommand(const QString &cmd);
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    void handleSetCommand(bool *handled, QString cmd);
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    void handleDelayedQuitAll(bool forced);
    void handleDelayedQuit(bool forced, Core::IEditor *editor);

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    void switchFile(bool previous);
    void switchFileNext();
    void switchFilePrev();

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signals:
    void delayedQuitRequested(bool forced, Core::IEditor *editor);
    void delayedQuitAllRequested(bool forced);
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private:
    FakeVimPlugin *q;
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    FakeVimOptionPage *m_fakeVimOptionsPage;
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    FakeVimExCommandsPage *m_fakeVimExCommandsPage;
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    QHash<Core::IEditor *, FakeVimHandler *> m_editorToHandler;
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    void triggerAction(const QString& code);
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    void setActionChecked(const QString& code, bool check);
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    void readSettings(QSettings *settings);
    void writeSettings(QSettings *settings);
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};

} // namespace Internal
} // namespace FakeVim

FakeVimPluginPrivate::FakeVimPluginPrivate(FakeVimPlugin *plugin)
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{
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    q = plugin;
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    m_fakeVimOptionsPage = 0;
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    m_fakeVimExCommandsPage = 0;

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    s_defaultExCommandMap[Constants::CMD_FILE_NEXT] =
        QRegExp("^n(ext)?!?( (.*))?$");
    s_defaultExCommandMap[Constants::CMD_FILE_PREV] =
        QRegExp("^(N(ext)?|prev(ious)?)!?( (.*))?$");
    s_defaultExCommandMap[CppTools::Constants::SWITCH_HEADER_SOURCE] =
        QRegExp("^A$");
    s_defaultExCommandMap[ProjectExplorer::Constants::BUILD] =
        QRegExp("^make$");
    s_defaultExCommandMap["Coreplugin.OutputPane.previtem"] =
        QRegExp("^(cN(ext)?|cp(revious)?)!?( (.*))?$");
    s_defaultExCommandMap["Coreplugin.OutputPane.nextitem"] =
        QRegExp("^cn(ext)?!?( (.*))?$");
    s_defaultExCommandMap[CppEditor::Constants::JUMP_TO_DEFINITION] =
        QRegExp("^tag?$");
    s_defaultExCommandMap[Core::Constants::GO_BACK] =
        QRegExp("^pop?$");
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}

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FakeVimPluginPrivate::~FakeVimPluginPrivate()
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{
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    q->removeObject(m_fakeVimOptionsPage);
    delete m_fakeVimOptionsPage;
    m_fakeVimOptionsPage = 0;
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    delete theFakeVimSettings();
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    q->removeObject(m_fakeVimExCommandsPage);
    delete m_fakeVimExCommandsPage;
    m_fakeVimExCommandsPage = 0;
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}

void FakeVimPluginPrivate::aboutToShutdown()
{
    theFakeVimSettings()->writeSettings(Core::ICore::instance()->settings());
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    writeSettings(Core::ICore::instance()->settings());
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}

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bool FakeVimPluginPrivate::initialize()
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{
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    Core::ActionManager *actionManager = Core::ICore::instance()->actionManager();
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    QTC_ASSERT(actionManager, return false);

    QList<int> globalcontext;
    globalcontext << Core::Constants::C_GLOBAL_ID;

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    m_fakeVimOptionsPage = new FakeVimOptionPage;
    q->addObject(m_fakeVimOptionsPage);
    theFakeVimSettings()->readSettings(Core::ICore::instance()->settings());
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    m_fakeVimExCommandsPage = new FakeVimExCommandsPage;
    q->addObject(m_fakeVimExCommandsPage);
    readSettings(Core::ICore::instance()->settings());
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    Core::Command *cmd = 0;
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    cmd = actionManager->registerAction(theFakeVimSetting(ConfigUseFakeVim),
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        Constants::INSTALL_HANDLER, globalcontext);
    cmd->setDefaultKeySequence(QKeySequence(Constants::INSTALL_KEY));

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    ActionContainer *advancedMenu =
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        actionManager->actionContainer(Core::Constants::M_EDIT_ADVANCED);
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    advancedMenu->addAction(cmd, Core::Constants::G_EDIT_EDITOR);
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    // EditorManager
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    QObject *editorManager = Core::ICore::instance()->editorManager();
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    connect(editorManager, SIGNAL(editorAboutToClose(Core::IEditor*)),
        this, SLOT(editorAboutToClose(Core::IEditor*)));
    connect(editorManager, SIGNAL(editorOpened(Core::IEditor*)),
        this, SLOT(editorOpened(Core::IEditor*)));

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    connect(theFakeVimSetting(SettingsDialog), SIGNAL(triggered()),
        this, SLOT(showSettingsDialog()));
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    connect(theFakeVimSetting(ConfigUseFakeVim), SIGNAL(valueChanged(QVariant)),
        this, SLOT(setUseFakeVim(QVariant)));
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    connect(theFakeVimSetting(ConfigReadVimRc), SIGNAL(valueChanged(QVariant)),
        this, SLOT(maybeReadVimRc()));
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    QAction *switchFileNextAction = new QAction(tr("Switch to next file"), this);
    cmd = actionManager->registerAction(switchFileNextAction, Constants::CMD_FILE_NEXT, globalcontext);
    cmd->setAttribute(Command::CA_Hide);
    connect(switchFileNextAction, SIGNAL(triggered()), this, SLOT(switchFileNext()));

    QAction *switchFilePrevAction = new QAction(tr("Switch to previous file"), this);
    cmd = actionManager->registerAction(switchFilePrevAction, Constants::CMD_FILE_PREV, globalcontext);
    cmd->setAttribute(Command::CA_Hide);
    connect(switchFilePrevAction, SIGNAL(triggered()), this, SLOT(switchFilePrev()));

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    // Delayed operatiosn
    connect(this, SIGNAL(delayedQuitRequested(bool,Core::IEditor*)),
        this, SLOT(handleDelayedQuit(bool,Core::IEditor*)), Qt::QueuedConnection);
    connect(this, SIGNAL(delayedQuitAllRequested(bool)),
        this, SLOT(handleDelayedQuitAll(bool)), Qt::QueuedConnection);
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    maybeReadVimRc();
    //    << "MODE: " << theFakeVimSetting(ConfigUseFakeVim)->value();
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    return true;
}

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static const char *exCommandMapGroup = "FakeVimExCommand";
static const char *reKey = "RegEx";
static const char *idKey = "Command";

void FakeVimPluginPrivate::writeSettings(QSettings *settings)
{
    settings->beginWriteArray(QLatin1String(exCommandMapGroup));

    int count = 0;
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    typedef QMap<QString, QRegExp>::const_iterator Iterator;
    const Iterator end = s_exCommandMap.constEnd();
    for (Iterator it = s_exCommandMap.constBegin(); it != end; ++it) {
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        const QString &id = it.key();
        const QRegExp &re = it.value();

        if ((s_defaultExCommandMap.contains(id) && s_defaultExCommandMap[id] != re)
            || (!s_defaultExCommandMap.contains(id) && !re.pattern().isEmpty())) {
            settings->setArrayIndex(count);
            settings->setValue(QLatin1String(idKey), id);
            settings->setValue(QLatin1String(reKey), re.pattern());
            ++count;
        }
    }

    settings->endArray();
}

void FakeVimPluginPrivate::readSettings(QSettings *settings)
{
    s_exCommandMap = s_defaultExCommandMap;

    int size = settings->beginReadArray(QLatin1String(exCommandMapGroup));
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    for (int i = 0; i < size; ++i) {
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        settings->setArrayIndex(i);
        const QString id = settings->value(QLatin1String(idKey)).toString();
        const QString re = settings->value(QLatin1String(reKey)).toString();
        s_exCommandMap[id] = QRegExp(re);
    }
    settings->endArray();
}

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void FakeVimPluginPrivate::maybeReadVimRc()
{
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    //qDebug() << theFakeVimSetting(ConfigReadVimRc)
    //    << theFakeVimSetting(ConfigReadVimRc)->value();
    //qDebug() << theFakeVimSetting(ConfigShiftWidth)->value();
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    if (!theFakeVimSetting(ConfigReadVimRc)->value().toBool())
        return;
    QString fileName =
        QDesktopServices::storageLocation(QDesktopServices::HomeLocation)
            + "/.vimrc";
    //qDebug() << "READING VIMRC: " << fileName;
    // Read it into a temporary handler for effects modifying global state.
    QPlainTextEdit editor;
    FakeVimHandler handler(&editor);
    handler.handleCommand("source " + fileName);
    theFakeVimSettings()->writeSettings(Core::ICore::instance()->settings());
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    //qDebug() << theFakeVimSetting(ConfigShiftWidth)->value();
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}

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void FakeVimPluginPrivate::showSettingsDialog()
{
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    Core::ICore::instance()->showOptionsDialog(
        QLatin1String(Constants::SETTINGS_CATEGORY),
        QLatin1String(Constants::SETTINGS_ID));
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}

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void FakeVimPluginPrivate::triggerAction(const QString& code)
{
    Core::ActionManager *am = Core::ICore::instance()->actionManager();
    QTC_ASSERT(am, return);
    Core::Command *cmd = am->command(code);
    QTC_ASSERT(cmd, return);
    QAction *action = cmd->action();
    QTC_ASSERT(action, return);
    action->trigger();
}

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void FakeVimPluginPrivate::setActionChecked(const QString& code, bool check)
{
    Core::ActionManager *am = Core::ICore::instance()->actionManager();
    QTC_ASSERT(am, return);
    Core::Command *cmd = am->command(code);
    QTC_ASSERT(cmd, return);
    QAction *action = cmd->action();
    QTC_ASSERT(action, return);
    QTC_ASSERT(action->isCheckable(), return);
    action->setChecked(check);
    action->trigger();
}

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void FakeVimPluginPrivate::windowCommand(int key)
{
    #define control(n) (256 + n)
    QString code;
    switch (key) {
        case 'c': case 'C': case control('c'):
            code = Core::Constants::CLOSE;
            break;
        case 'n': case 'N': case control('n'):
            code = Core::Constants::GOTONEXT;
            break;
        case 'o': case 'O': case control('o'):
            code = Core::Constants::REMOVE_ALL_SPLITS;
            code = Core::Constants::REMOVE_CURRENT_SPLIT;
            break;
        case 'p': case 'P': case control('p'):
            code = Core::Constants::GOTOPREV;
            break;
        case 's': case 'S': case control('s'):
            code = Core::Constants::SPLIT;
            break;
        case 'w': case 'W': case control('w'):
            code = Core::Constants::GOTO_OTHER_SPLIT;
            break;
    }
    #undef control
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    //qDebug() << "RUNNING WINDOW COMMAND: " << key << code;
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    if (code.isEmpty()) {
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        //qDebug() << "UNKNOWN WINDOWS COMMAND: " << key;
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        return;
    }
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    triggerAction(code);
}

void FakeVimPluginPrivate::find(bool reverse)
{
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    if (Find::FindPlugin *plugin = Find::FindPlugin::instance()) {
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        plugin->setUseFakeVim(true);
        plugin->openFindToolBar(reverse
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                ? Find::FindPlugin::FindBackward
                : Find::FindPlugin::FindForward);
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    }
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}

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void FakeVimPluginPrivate::findNext(bool reverse)
{
    if (reverse)
        triggerAction(Find::Constants::FIND_PREVIOUS);
    else
        triggerAction(Find::Constants::FIND_NEXT);
}

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// This class defers deletion of a child FakeVimHandler using deleteLater().
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class DeferredDeleter : public QObject
{
    Q_OBJECT

    FakeVimHandler *m_handler;

public:
    DeferredDeleter(QObject *parent, FakeVimHandler *handler)
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        : QObject(parent), m_handler(handler)
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    {}

    virtual ~DeferredDeleter()
    {
        if (m_handler) {
            m_handler->disconnectFromEditor();
            m_handler->deleteLater();
            m_handler = 0;
        }
    }
};

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void FakeVimPluginPrivate::editorOpened(Core::IEditor *editor)
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{
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    if (!editor)
        return;

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    QWidget *widget = editor->widget();
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    if (!widget)
        return;
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    // we can only handle QTextEdit and QPlainTextEdit
    if (!qobject_cast<QTextEdit *>(widget) && !qobject_cast<QPlainTextEdit *>(widget))
        return;
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    //qDebug() << "OPENING: " << editor << editor->widget()
    //    << "MODE: " << theFakeVimSetting(ConfigUseFakeVim)->value();

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    FakeVimHandler *handler = new FakeVimHandler(widget, 0);
    // the handler might have triggered the deletion of the editor:
    // make sure that it can return before being deleted itself
    new DeferredDeleter(widget, handler);
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    m_editorToHandler[editor] = handler;
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    connect(handler, SIGNAL(extraInformationChanged(QString)),
        this, SLOT(showExtraInformation(QString)));
    connect(handler, SIGNAL(commandBufferChanged(QString)),
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        this, SLOT(showCommandBuffer(QString)));
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    connect(handler, SIGNAL(writeFileRequested(bool*,QString,QString)),
        this, SLOT(writeFile(bool*,QString,QString)));
    connect(handler, SIGNAL(selectionChanged(QList<QTextEdit::ExtraSelection>)),
        this, SLOT(changeSelection(QList<QTextEdit::ExtraSelection>)));
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    connect(handler, SIGNAL(moveToMatchingParenthesis(bool*,bool*,QTextCursor*)),
        this, SLOT(moveToMatchingParenthesis(bool*,bool*,QTextCursor*)));
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    connect(handler, SIGNAL(indentRegion(int*,int,int,QChar)),
        this, SLOT(indentRegion(int*,int,int,QChar)));
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    connect(handler, SIGNAL(checkForElectricCharacter(bool*,QChar)),
        this, SLOT(checkForElectricCharacter(bool*,QChar)));
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    connect(handler, SIGNAL(completionRequested()),
        this, SLOT(triggerCompletions()));
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    connect(handler, SIGNAL(windowCommandRequested(int)),
        this, SLOT(windowCommand(int)));
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    connect(handler, SIGNAL(findRequested(bool)),
        this, SLOT(find(bool)));
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    connect(handler, SIGNAL(findNextRequested(bool)),
        this, SLOT(findNext(bool)));
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    connect(handler, SIGNAL(handleExCommandRequested(QString)),
        this, SLOT(handleExCommand(QString)));
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    connect(handler, SIGNAL(handleSetCommandRequested(bool *,QString)),
        this, SLOT(handleSetCommand(bool *,QString)));
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    handler->setCurrentFileName(editor->file()->fileName());
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    handler->installEventFilter();
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    // pop up the bar
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    if (theFakeVimSetting(ConfigUseFakeVim)->value().toBool()) {
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       showCommandBuffer(QString());
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       handler->setupWidget();
    }
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}

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void FakeVimPluginPrivate::editorAboutToClose(Core::IEditor *editor)
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{
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    //qDebug() << "CLOSING: " << editor << editor->widget();
    m_editorToHandler.remove(editor);
}

void FakeVimPluginPrivate::setUseFakeVim(const QVariant &value)
{
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    //qDebug() << "SET USE FAKEVIM" << value;
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    bool on = value.toBool();
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    if (Find::FindPlugin::instance())
        Find::FindPlugin::instance()->setUseFakeVim(on);
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    if (on) {
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        Core::EditorManager::instance()->showEditorStatusBar(
            QLatin1String(Constants::MINI_BUFFER),
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            "vi emulation mode. Type :q to leave. Use , Ctrl-R to trigger run.",
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            tr("Quit FakeVim"), this, SLOT(quitFakeVim()));
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        foreach (Core::IEditor *editor, m_editorToHandler.keys())
            m_editorToHandler[editor]->setupWidget();
    } else {
        Core::EditorManager::instance()->hideEditorStatusBar(
            QLatin1String(Constants::MINI_BUFFER));
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        TextEditor::TabSettings ts =
            TextEditor::TextEditorSettings::instance()->tabSettings();
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        foreach (Core::IEditor *editor, m_editorToHandler.keys())
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            m_editorToHandler[editor]->restoreWidget(ts.m_tabSize);
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    }
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}

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void FakeVimPluginPrivate::triggerCompletions()
{
    FakeVimHandler *handler = qobject_cast<FakeVimHandler *>(sender());
    if (!handler)
        return;
    if (BaseTextEditor *bt = qobject_cast<BaseTextEditor *>(handler->widget()))
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